Be careful what you wish for. Antisocial misfit Ryouhei Arisu wanted nothing more than to leave his mundane life behind, but a careless wish on a firework transports him to the post-apocalyptic Borderland, a sinister parallel reality where danger lurks around every corner and survival is not guaranteed. To live to fight another day, Ryouhei and other unwilling contestants must win a series of deadly games, each more dangerous than the last — but returning home means putting not only his skills, but also Ryouhei’s humanity to the ultimate test.